Juan Carlos Barragan-Lopez, of Arizona, and Jose Biglobo-Gutierrez, of of Springfield, pleaded guilty to drug trafficking charges this week.

SPRINGFIELD – Two men who were part of a drug-dealing network that was bringing a kilogram of cocaine into the city each week in 2008 are now serving state prison terms.

Juan Carlos Barragan-Lopez, 25, of Phoenix, Ariz., and Jose Biglobo-Gutierrez, 29, of 154 Walnut St., Springfield, pleaded guilty this week in Hampden Superior Court. A third man charged in the drug network is due to plead guilty next week.

They were arrested in November 2008 when investigators scheduled a drug transaction using an undercover police officer.

Barragan-Lopez and Biglobo-Gutierrez pleaded guilty before Judge C. Brian McDonald to reduced charges of trafficking cocaine in the amount of 28 to 100 grams of cocaine and conspiracy counts. They were originally charged with trafficking over 200 grams of cocaine, for which a conviction requires a 15-year minimum mandatory sentence.

Barragan-Lopez was sentenced on Tuesday to a seven- to nine-year state prison term, while Biglobo-Gutierrez was sentenced on Wednesday to a five- to nine-year term. The judge agreed to allow Biglobo-Gutierrez to serve the time in the Shirley state prison because he can have his thrice-weekly dialysis treatments there.

A third man, Fernando Cortez, of 23 Shoemaker Lane, Agawam, is slated to plead guilty on Nov. 17.

Barragan-Lopez, as part of his plea agreement, forfeited $23,336 in cash that was found in his car at the time of the arrest and the car itself, a 2002 Dodge Stratus.

When police arrested the three, a hidden compartment in the car was found to contain both money and drugs.

Assistant district attorney John C. Bryson Jr. described Barragan-Lopez as the main player who supplied the drugs, while Biglobo-Gutierrez acted as the middle man.

The arrests were part of a lengthy investigation by city narcotics detectives who determined the drug operation was bringing at least a kilogram of cocaine into Springfield each week, police said at the time of the arrests.

Biglobo-Gutierrez made arrangements for the sale with a man he did not know was an undercover police officer, and detectives then observed him leaving his Walnut Street home and going to Enfield, where he met with Barragan-Lopez on Nov. 30, 2008, according to the prosecutor.

“They set up the exchange for the next day,” Bryson said. Biglobo-Gutierrez drove to a Pride station at Columbus Avenue and Union Street at about 3 p.m. and then got into Barragan-Lopez’s car. Police then arrested the three men.

Bernard T. O’Connor Jr., lawyer for Biglobo-Gutierrez, told McDonald his client, a native of Guatemala who worked on area farms, lives with his wife and two children ages 7 and 5. He said Biglobo-Gutierrez had no prior criminal record and sometimes did farm work even after he had renal failure.

O’Connor said the federal Department of Homeland Security intends to lodge a detainer against Biglobo-Gutierrez so he faces possible deportation when he finishes his prison sentence.